Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DD-004-441-004 PIECE 12 found under Seal Plain by Waukesha Bearings Corporation. The National Stock Number assigned to this part is 5330012055615, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DD-004-441-004 PIECE 12.